Date: Sat, 11 Dec 2021 01:34:56 GMT From: Colin Percival <cperciva@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: efb381caf102 - stable/13 - EC2: Turn off IPv6 DAD Message-ID: <202112110134.1BB1Yut7011438@gitrepo.freebsd.org>
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The branch stable/13 has been updated by cperciva: URL: https://cgit.FreeBSD.org/src/commit/?id=efb381caf102938d24149f38e98881d282ded11a commit efb381caf102938d24149f38e98881d282ded11a Author: Colin Percival <cperciva@FreeBSD.org> AuthorDate: 2021-11-23 04:16:34 +0000 Commit: Colin Percival <cperciva@FreeBSD.org> CommitDate: 2021-12-11 01:34:23 +0000 EC2: Turn off IPv6 DAD Disable Duplicate Address Detection in EC2 instances. The networking configuration in EC2, with IPv6 addresses assigned by DHCPv6 and host egress filtering, makes "duplicate addresses" impossible. This speeds up the boot process in EC2 by 2 seconds. Sponsored by: https://www.patreon.com/cperciva Differential Revision: https://reviews.freebsd.org/D33091 (cherry picked from commit 81075203a057c9ba3467a7f90ea1e9469d7f7723) --- release/tools/ec2.conf | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/release/tools/ec2.conf b/release/tools/ec2.conf index 888a446659a5..bb972c456fbc 100644 --- a/release/tools/ec2.conf +++ b/release/tools/ec2.conf @@ -68,6 +68,10 @@ vm_extra_pre_umount() { echo 'rtsold_enable="YES"' >> ${DESTDIR}/etc/rc.conf echo 'rtsold_flags="-M /usr/local/libexec/rtsold-M -a"' >> ${DESTDIR}/etc/rc.conf + # Turn off IPv6 Duplicate Address Detection; the EC2 networking + # configuration makes it unnecessary. + echo 'net.inet6.ip6.dad_count=0' >> ${DESTDIR}/etc/sysctl.conf + # Provide a script which rtsold can use to launch DHCPv6 mkdir -p ${DESTDIR}/usr/local/libexec cat > ${DESTDIR}/usr/local/libexec/rtsold-M <<'EOF'
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